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anonymous

  • one year ago

Which is the set of roots for the equation? x2 + 3x - 8 = 0 a: {18,-1} b: {-6,3} c: {-2,9} d: {9}

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  1. campbell_st
    • one year ago
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    I think the equation should be \[x^2 + 3x - 18 = 0\] is that correct..?

  2. anonymous
    • one year ago
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    i think

  3. anonymous
    • one year ago
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    yeah it should

  4. anonymous
    • one year ago
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    Which is the set of roots for the equation? x2 + 3x - 18 = 0 a: {18,-1} b: {-6,3} c: {-2,9} d: {9}

  5. anonymous
    • one year ago
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    what do you guys think

  6. jdoe0001
    • one year ago
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    hint: \(\large \begin{array}{cccllll} x^2&+3x&-18\\ &\uparrow &\uparrow \\ &6-3&6\cdot -3 \end{array}\)

  7. anonymous
    • one year ago
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    so b

  8. jdoe0001
    • one year ago
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    well.. try those 2 roots in "b", see if they work

  9. jdoe0001
    • one year ago
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    have you covered factoring of quadratics yet?

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